<!-- yangbuyi Copyright (c) https://yby6.com 2023. -->

<template>
  <view class="u-keyboard" @touchmove.stop.prevent="noop">
    <view
      class="u-keyboard__button-wrapper"
      v-for="(item, index) in numList"
      :key="index"
    >
      <view
        class="u-keyboard__button-wrapper__button"
        :style="[itemStyle(index)]"
        @tap="keyboardClick(item)"
        hover-class="u-hover-class"
        :hover-stay-time="200"
      >
        <text class="u-keyboard__button-wrapper__button__text">{{ item }}</text>
      </view>
    </view>
    <view class="u-keyboard__button-wrapper">
      <view
        class="u-keyboard__button-wrapper__button u-keyboard__button-wrapper__button--gray"
        hover-class="u-hover-class"
        :hover-stay-time="200"
        @touchstart.stop="backspaceClick"
        @touchend="clearTimer"
      >
        <u-icon name="backspace" color="#303133" size="28"></u-icon>
      </view>
    </view>
  </view>
</template>

<script>
import props from "./props.js";

/**
 * keyboard 键盘组件
 * @description
 * @tutorial
 * @property {String}	mode		键盘的类型，number-数字键盘，card-身份证键盘
 * @property {Boolean}	dotDisabled	是否显示键盘的"."符号
 * @property {Boolean}	random		是否打乱键盘按键的顺序
 * @event {Function} change		点击键盘触发
 * @event {Function} backspace	点击退格键触发
 * @example
 */
export default {
  mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
  data() {
    return {
      backspace: "backspace", // 退格键内容
      dot: ".", // 点
      timer: null, // 长按多次删除的事件监听
      cardX: "X", // 身份证的X符号
    };
  },
  computed: {
    // 键盘需要显示的内容
    numList() {
      let tmp = [];
      if (this.dotDisabled && this.mode == "number") {
        if (!this.random) {
          return [1, 2, 3, 4, 5, 6, 7, 8, 9, 0];
        } else {
          return uni.$u.randomArray([1, 2, 3, 4, 5, 6, 7, 8, 9, 0]);
        }
      } else if (!this.dotDisabled && this.mode == "number") {
        if (!this.random) {
          return [1, 2, 3, 4, 5, 6, 7, 8, 9, this.dot, 0];
        } else {
          return uni.$u.randomArray([1, 2, 3, 4, 5, 6, 7, 8, 9, this.dot, 0]);
        }
      } else if (this.mode == "card") {
        if (!this.random) {
          return [1, 2, 3, 4, 5, 6, 7, 8, 9, this.cardX, 0];
        } else {
          return uni.$u.randomArray([1, 2, 3, 4, 5, 6, 7, 8, 9, this.cardX, 0]);
        }
      }
    },
    // 按键的样式，在非乱序&&数字键盘&&不显示点按钮时，index为9时，按键占位两个空间
    itemStyle() {
      return (index) => {
        let style = {};
        if (this.mode == "number" && this.dotDisabled && index == 9)
          style.width = "464rpx";
        return style;
      };
    },
    // 是否让按键显示灰色，只在非乱序&&数字键盘&&且允许点按键的时候
    btnBgGray() {
      return (index) => {
        if (
          !this.random &&
          index == 9 &&
          (this.mode != "number" ||
            (this.mode == "number" && !this.dotDisabled))
        )
          return true;
        else return false;
      };
    },
  },
  created() {},
  methods: {
    // 点击退格键
    backspaceClick() {
      this.$emit("backspace");
      clearInterval(this.timer); //再次清空定时器，防止重复注册定时器
      this.timer = null;
      this.timer = setInterval(() => {
        this.$emit("backspace");
      }, 250);
    },
    clearTimer() {
      clearInterval(this.timer);
      this.timer = null;
    },
    // 获取键盘显示的内容
    keyboardClick(val) {
      // 允许键盘显示点模式和触发非点按键时，将内容转为数字类型
      if (!this.dotDisabled && val != this.dot && val != this.cardX)
        val = Number(val);
      this.$emit("change", val);
    },
  },
};
</script>

<style lang="scss" scoped>
@import "../../libs/css/components.scss";
$u-number-keyboard-background-color: rgb(224, 228, 230) !default;
$u-number-keyboard-padding: 8px 10rpx 8px 10rpx !default;
$u-number-keyboard-button-width: 222rpx !default;
$u-number-keyboard-button-margin: 4px 6rpx !default;
$u-number-keyboard-button-border-top-left-radius: 4px !default;
$u-number-keyboard-button-border-top-right-radius: 4px !default;
$u-number-keyboard-button-border-bottom-left-radius: 4px !default;
$u-number-keyboard-button-border-bottom-right-radius: 4px !default;
$u-number-keyboard-button-height: 90rpx !default;
$u-number-keyboard-button-background-color: #ffffff !default;
$u-number-keyboard-button-box-shadow: 0 2px 0px #bbbcbe !default;
$u-number-keyboard-text-font-size: 20px !default;
$u-number-keyboard-text-font-weight: 500 !default;
$u-number-keyboard-text-color: $u-main-color !default;
$u-number-keyboard-gray-background-color: rgb(200, 202, 210) !default;
$u-number-keyboard-u-hover-class-background-color: #bbbcc6 !default;

.u-keyboard {
  @include flex;
  flex-direction: row;
  justify-content: space-around;
  background-color: $u-number-keyboard-background-color;
  flex-wrap: wrap;
  padding: $u-number-keyboard-padding;

  &__button-wrapper {
    box-shadow: $u-number-keyboard-button-box-shadow;
    margin: $u-number-keyboard-button-margin;
    border-top-left-radius: $u-number-keyboard-button-border-top-left-radius;
    border-top-right-radius: $u-number-keyboard-button-border-top-right-radius;
    border-bottom-left-radius: $u-number-keyboard-button-border-bottom-left-radius;
    border-bottom-right-radius: $u-number-keyboard-button-border-bottom-right-radius;

    &__button {
      width: $u-number-keyboard-button-width;
      height: $u-number-keyboard-button-height;
      background-color: $u-number-keyboard-button-background-color;
      @include flex;
      justify-content: center;
      align-items: center;
      border-top-left-radius: $u-number-keyboard-button-border-top-left-radius;
      border-top-right-radius: $u-number-keyboard-button-border-top-right-radius;
      border-bottom-left-radius: $u-number-keyboard-button-border-bottom-left-radius;
      border-bottom-right-radius: $u-number-keyboard-button-border-bottom-right-radius;

      &__text {
        font-size: $u-number-keyboard-text-font-size;
        font-weight: $u-number-keyboard-text-font-weight;
        color: $u-number-keyboard-text-color;
      }

      &--gray {
        background-color: $u-number-keyboard-gray-background-color;
      }
    }
  }
}

.u-hover-class {
  background-color: $u-number-keyboard-u-hover-class-background-color;
}
</style>
